Pipe hanger



reaaiea Dec. 24,v 1929 UNITED STATES LOTEAR R. ZIFFEBERfF COLUMBIA, PENNSYLVANIA PIPE HANGER Application tiled 'April 26,

This invention relates to a methodof making pipe hangers of the kind in which a ring is joined inseparably by a swivel connection to a screw-threaded sleeve adapted to depend adjustably from an overhead support. In'

such a pipe hanger I may optionally incorporate means associated with the swivel connection for normally maintaining the ring in a fixed rotative position relative to the sleeve. The production of a hanger having its two parts so relatedmay desirably be made by casting operations, and the improvements herein set forth are directed more.

particularly to the steps employed in the production. of the hanger components and to their. association one with the other in an in- ^separable swiveledy relationship. The present invention was first disclosed in my pipe vhanger application tiled June 18, 1927, Serial No. 199,706, of which application this is a continuation in part.

To assist in an understanding of my invention referenceis made to the accompanying drawing whereinl 'Figure 1 is a view in elevation of a pipe hanger comprising a ring which is swivelly and-inseparabl joined to a supporting sleeve;

Fig. 2 is a fbi'agmentary detail showing in velevation the hanger sleeve, and in vertical section a portion of the associated ring, these parts being formed for a limited relative longitudinal movement;

Fig. 3 is a similar view of the same hanger parts, showing the ring shifted to a turning position upon the sleeve;

ig. 4 is a view in elevation of the sleeve as it appears prior to the assembly therewith of vthe ring component; I

Fig. 5 is a fragmentary sectional detail of the ring component disassociated from the sleeve;

Fig. 6 which is a view similar to Fig. 2 shows a construction in which the ring is joined to the sleeve for free rotation but not for relative longitudinal movement; and

Fig. 7 is a view similar to Fig-4 o the sleeve illustrated in Fig. 6.-

The pipe hanger herein shown comprises a ring A'llaving a swiveled connection with a sleeve B the'internal threads 9 of which upon the bolt.

1929. seriai no. 358,419.

co-operate with a depending bolt C having an overhead fastening. By rotating the sleeve the h-anger may be adjusted vertically A device of this character is adapted 'to supporta pipe'D which is receivable within the ring A, as shown.

The sleeve is provided by preference with a polygonalhead 10 affording a convenient wrench hold. It may also have one or more transverse apertures 11 affording a view of the supporting bolt C which is threaded therewithi'n. A flange 12 which extends circumferentially of the sleeve provides' an upper stop for a collar 14 which upstands from the ring component A. At thelower end of the sleeve' is a second flange 15 providing a lower stop for the ring'collar. The sleeve portion 16 between the two stop flanges constitutes a neck around which the collar is rotatable, and in the construction of Figs. 2 to 5, the neck is of sutlicient length for the collar to shift vertically thereupon so as to assume either of two positions.

By reference to Figs. 2 and 3, it will be noted that the collar is provided iteriorly with an annular channel 17 which is open on its lower side. The upper side of this channel is defined by a shoulder 18 which is normally rested upon'the flange 15. 'This shoulder undulates to provide teeth 19 havin a form and disposition for co-operation wit complementary teeth 20 which upstand from the stop flange 15. When the ring is in down position, 'as indicated in Figs. i and 2, these teeth 19 and 20 interengage to oppose rotative movement of the ring upon the sleeve. The collar 14 which surrounds the neck portion of the sleevev when'shifted to an upper position, as indicated in Fig. 3,- permits the ring to rotate freely upon the sleeve.

In the construction shown in Fig. 6, the swiveled connection'between the ring and sleeve is the same as that elsewhere illustrated with the oneexception that the ring collar 14* is so related to the upper and lower sleeve stops 12 and 15* that no appreciable relative longitudinal movement can take place. In this construction also I dispense with coacting teeth by which to resist turning movement Y' of one part relative to the other, the ring being free always for rotation upon the sleeve between its two stops.

A pipe hanger answering generally to the foregoing description is particularly advantageou-s if its parts are made sturdy and dependable. This can be accomplished economically in acommercial way by casting the sleeve and ring from hard or white iron whichis thereafter annealed. The method which I pursue in this connection ``islto cast the sleeve, to coat the sleeve with a thin insulation 21 (see Figs. 5 and 7) preferably in a fluid condition and consisting of a suitable sand mixture in which oil or shellac may be used to advantage, to dry the insulation after its application to the sleeve, to utilize the insulated sleeve as a. core in the mold wherein the ring is to be cast, to cast the ring so that its collar will surround the sleeve neck, to remove the insulation from betweenthe sleeve and collar, and to anneal the hanger in its entirety-all in the orderinamed. The operation of tapping the sleeve to provide its interior threads 9 will follow annealing of the sleeve which preferably is done subsequent to casting of the ring thereon.

By proceeding accordingto these directions-I obtain a product which is uniformly satisfactory. The insulation is applied to such portions of the sleeve as lie close to the ring collar, viz, the neck 16 and proximate faces of the two stops 12 and 15. The thickness of this insulation need be only around 315 of an inch so that when dislodged in the finished product the amount of loose play between the ring and sleeve will be inconsequential. In addition, such a thin coating of insulation will ermit the sleeve to transfer to the shoulder o the ring collar the impression of any teeth which may be formed thereon, as in the construction of Figs. 2 to 5, due to the application of this insulation in a manner i which preserves the form of these teeth with sufficient definiteness for the purpose stated.

An extensive experience in the production of pipe hangers has demonstrated that the construction and method of manufacture herein described meets all the necessary commercial requirements. The hangers so made are sturdy, require no machining of consequence, and present their two components in inseparable relation for convenience in handling and installation.

I claim:

1. The method of producing a pipe hanger which consists in casting a sleeve having at one end thereof a toothed stop, in applying to a portion of the sleeve including the stop, an insulation through which the form of the stop teeth is preserved, in casting around said insulated portion of the sleeve a collared ring which receives toothed impressions from the sleeve, and in removing the insulation from between these parts whereby the two sets of teeth may co-operate.

2. The method of producing a two-part pipe hanger casting which consists first in forming a sleeve with spaced annular stops one of which is provided with teeth facing the other, in coating the toothed stop and adjacent portion of the sleeve with a thin insulation through which the form of the stop teeth are preserved, in casting around the sleeve a collared ring which receives toothed impressions from the toothed stop of the sleeve, and in removing the insulation from between the two castings whereby the two sets of teeth may cooperate.

3. The method of producing a pipe hanger which consists in casting a sleeve with spaced stops, in applying a thin insulation to the sleeve portion between the stops, in casting around said insulated portion of the sleeve a collared ring which takes internally the external form o'f the sleeve, and in removing the insulation lfrom between these parts lwhereby the ring is freed for movement upon the sleeve between the stops thereof.

4. The method of producing a pipe hanger formed of sections comprising casting a sleeve with a stop at the end thereof provided with spaced projections, applying a thin coating to the sleeve and said spaced projections, casting a collared ring about the coated sleeve as a core in such a manner that the collar of thering will surround the sleeve and have formed therein spaced projections for cooperation with the projections on the sleeve for resisting relative rotative movement, and removing the coating whereby a swivel connection is provided between the sleeve and collar, and

the ring is freed for rotative movement upon the sleeve.

5. The method of producing a pipe hanger formed of inseparable sections including a sleeve and a ring having an integral collar swiveled on the sleeve comprising casting the sleeve with a wrench engaging head at one end and an annular flange at its other end provided with cooperating projections on its inner side surface and an intermediate annular flange, applying a coating to the sleeve which extends from the periphery of the intermediate flange along the sleeve and over the periphery of the end flange, drying said coating, casting a ling having a collar around the sleeve between the flanges thereon so that the collar receives cooperating projections from the flange on the sleeeve, and removing the coating from between the sleeve and collar.

i 6. The method of making a pipe hanger comprising producing a sleeve with spaced stops thereon and applying a coating to the sleeve between the stops, drying said coating, casting around the coated portion of the sleeve as a core a collared pipe receiving ring which takes internally the external form of the coating, removing the coating whereby the collaredpipe receiving ring is free for limited longitudinal and free rotary movement upon the sleeve between the stops and subjecting the hanger to an annealing process.

In testimony whereof, I have hereunto set 5 my hand and aiixed my seal this' 16th day of April, 1929.

LOTHAR R.. ZIFFERER. [L 5.] 

